This name is a synonym of Duthiastrum linifolium (E.Phillips) M.P.de Vos.
The record derives from iPlants
(data supplied on 2012-03-23)
which reports it as a synonym (record 327962) with original publication details: J. S. African Bot. 40: 306 1974.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:436882-1.
This name was in version 1 of The Plant List, record kew-327962.